The Professor here. Today’s topic is how to farm Voidhearts.
Voidhearts are a key material for Backpack Upgrade II, summoning the Voidtaken Grizzly and extending the Breach time limit. But a Void Eye only drops one 5% of the time. The route I recommend: beat the entombed Void Fiend, take its Veilbound Key, and clear the coffer waves right away. If it goes well, you get up to 4 Voidhearts in a single Breach.
TL;DR: the Voidheart route
- Enter a Goblin Breach, open the map and look for an outpost. Goblin, spider or Void, any outpost works
- In the crystal room under the outpost, find the entombed Void Fiend
- Kill the enemies around it, then break the crystal with a pickaxe to free it
- Beat the Void Fiend for a Voidheart and a Veilbound Key
- Explore the Goblin Breach caves for a glowing purple coffer, use the key and clear the waves. Reach wave 5 for 2β3 more Voidhearts
What the Void Fiend drops

The entombed Void Fiend and the Void Fiend that shows up late in the Void Surge drop the same things, all guaranteed: 1 Voidheart, 1 Veilbound Key, 2 Runestone Shards and 3β4 Void Essence.
Where to find the entombed Void Fiend
1. Find an outpost on the map
Once you’re in a Goblin Breach, open your map. The slightly larger buildings are outposts. Not just the purple Void outpost: Goblin and spider outposts also have an entombed Void Fiend in the basement. Just head to the nearest one.

2. Go inside and head down
There are lots of enemies around the outpost. Inside the building, look for stairs leading down.


3. Break the seal in the crystal room
In the crystal room underground, the Void Fiend is sealed inside a crystal. First, kill the enemies around it. Then switch to your pickaxe and break the crystal to release it.


4. Beat the Void Fiend
The freed Void Fiend has 700 HP, and it teleports after you if you back off, so kiting is hard. Iron gear makes this rough; bring at least Adamantite gear.
Outpost too far away? A flying Void Eye can drop a Voidheart too, but only 5% of the time.
Use the Veilbound Key on the coffer
The Veilbound Key disappears when you return to your world, so use it in the same Breach. Look for a glowing purple coffer while exploring the underground caves of the Goblin Breach. You can also find one inside the goblin slums.

Use the key and monsters attack in waves. You have 2 minutes for all 5 waves. Clear them and the coffer bursts open.

If you beat the Void Fiend, these waves are easy. Two tips:
1. Before using the key, clear the small fry around the coffer
2. When the waves start, switch to a weapon that hits several enemies at once, like a Battleaxe, and swing away
That alone wins it!
Coffer rewards

- Wave 3 is the turning point: from there a Voidheart is guaranteed
- You get the full table for your last cleared wave. Reach wave 5 for 2β3 Voidhearts
- Wave 5 extras: a Breach key at 30% and the Goblin Painting: The Breaches recipe at 15%
- If time runs out before you clear even one wave, the coffer crumbles to dust
One Voidheart from the Fiend and 2β3 from the coffer: up to 4 Voidhearts per Breach. Swing a Battleaxe through the waves and they are no threat.



